Bar Detector

img_lrg/nautilus.jpg not found

© Italian National Institute of Nuclear Physics (INFN)—National Laboratory of Frascati.

The Nautilus gravitational wave antenna is a 2300 kg aluminum cylinder, suspended in a vacuum and cooled to 0.1 K. A burst of gravitational radiation could stretch and compress the cylinder, exciting oscillations at its resonant frequencies of 908 and 924 Hz. The cylinder is cooled to decrease thermal noise, reduce mechanical losses, and allow the use of superconducting sensors to detect low-amplitude vibrations that could be direct evidence of a gravitational wave. (Unit: 3)